I'd imagine that the cellular provider would be seeking to improve the infrastructure in the particular area first?

After a few not so great results you suddenly improve your skills like anything else. 

The property value has been improving nicely for me, so I was thinking of selling it to lock in the profit (trying to time the market :D ).

I'll learn from the experience good or bad which will give me the confidence to move one to property number two.Good Luck

Are there any other improvements on the property like fencing, grading, roads, etc.?

If you add it to your balance sheet to improve your net worth then, again, that is not profit.  

I have to experience in real estate investing but am confident I can be successful with the right knowlege, highly motivated and would appreciate some good tips on starting out in this business

None of these problems happen if it's pre-funded.c) Sponsors prefer to get their money as soon as possible, and to be confident they're going to get it.

I attended several classes and read books on wholesaling but don't have the confidence to do first deal.

The lease up fee must vary by geography, that is not the norm in my area.Are you confident that your price is right?